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dc.contributorFacultad de Ciencias Biologicas y Ambientaleses_ES
dc.contributor.authorOlfati, Ali
dc.contributor.authorMojtahedin, Ali
dc.contributor.authorSadeghi, Tayebeh
dc.contributor.authorAkbari, Mohsen
dc.contributor.authorMartínez Pastor, Felipe 
dc.contributor.otherBiologia Celulares_ES
dc.date2018
dc.date.accessioned2019-05-12T23:51:29Z
dc.date.available2019-05-12T23:51:29Z
dc.date.issued2019-05-13
dc.identifier.citationSpanish Journal of Agricultural Research, 2018, vol. 16, n. 2es_ES
dc.identifier.otherhttp://revistas.inia.es/index.php/sjar/article/view/12753es_ES
dc.identifier.urihttp://hdl.handle.net/10612/10732
dc.descriptionP. 1-7es_ES
dc.description.abstractThis study was conducted to compare the effects of thermal stress on growth performance and some immunity variables of broiler chickens. Birds were randomly assigned to one of three thermal treatments as follows: cold stress (CS, 12±1 °C), (b) heat stress (HS, 33±3 °C) and (c) thermoneutral (TN, 24±2 °C). Body weight gain (BWG), feed intake (FI), water intake (WI) and feed conversion ratio (FCR) were recorded. In order to evaluate the primary and secondary humoral immune responses, two birds per replicate were intravenously administrated with a suspension of 7% sheep red blood cell (SRBC) at 28 and 35 days. The heat-stressed broiler chickens had lower FI (-14.90%), BWG (-25.71%) and higher FCR (+13.06%) in comparison to broiler chickens reared under TN condition (p<0.001) from 1 to 42 days of age. The cold-stressed broiler chickens showed lower FI (-22.05%), BWG (-38.32%) and higher FCR (+22.47%) in comparison to birds reared under TN conditions (p<0.001). Stressed birds (CS and HS) showed decreased antibody titer against SRBC, lymphocyte count and the relative weights of lymphoid organs and increased heterophil count, heterophil to lymphocyte ratio and the serum concentration of corticosterone, in comparison to birds in TN group (p<0.001). In conclusion, HS and CS conditions have similar negative effects on performance and immunity of broiler chickens.es_ES
dc.languageenges_ES
dc.publisherInstituto Nacional de Investigación y Tecnología Agraria y Alimentariaes_ES
dc.subjectVeterinariaes_ES
dc.subject.otherAntibody titeres_ES
dc.subject.otherBroiler chickenes_ES
dc.subject.otherImmunityes_ES
dc.subject.otherThermal stresses_ES
dc.titleComparison of growth performance and immune responses of broiler chicks reared under heat stress, cold stress and thermoneutral conditionses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.description.peerreviewedSIes_ES


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